顶底角钢连接半刚性钢结构抗震性能数值分析  

NUMERICAL ANALYSIS FOR SEISMIC BEHAVIOR OF SEMI-RIGID STEEL BEAM-TO-COLUMN CONNECTION WITH TOP-AND-SEAT ANGLES

作　　者：蔡小宁[1] 孟少平[1] 孙巍巍[2] 吴京[1] 

机构地区：[1]东南大学混凝土及预应力混凝土教育部结构重点实验室,南京210096 [2]南京理工大学土木工程系,南京210094

出　　处：《工程力学》2012年第7期124-129,146,共7页Engineering Mechanics

基　　金：国家自然科学基金项目(50878055);江苏省自然科学基金项目(BK2011707)

摘　　要：为了研究顶底角钢连接半刚性钢结构的抗震性能,介绍相关文献中角钢的屈服荷载及初始刚度的计算,基于角钢的拉压试验结果,验证角钢的屈服荷载及初始刚度计算方法的准确性并对角钢的屈服荷载计算公式进行修正,进而提出角钢在反复拉压荷载下的恢复力模型;编制角钢连接单元,提出基于有限元软件OpenSEES的顶底角钢连接半刚性钢结构的建模方法,对顶底角钢连接半刚性钢结构低周往复试验、振动台试验进行数值模拟,所得结果与试验结果进行比较,结果表明:该文提出的建模方法具有单元少、自由度少、建模方便、计算效率高、耗时少等优点,采用该文方法进行的数值模拟与试验结果吻合较好,精度能满足工程需求。The calculation for yield load and initial stiffness of the angles of a semi-rigid steel structure is introduced. Based on the tension and compression test results of the angles, the accuracy of calculation for yield load and initial stiffness of the angles are verified and the formula of yield load is modified. The hysteresis model of the angles under repeated tension and compression was proposed. Based on the finite element software OpenSEES, the angle connection element is developed and the modeling method for the semi-rigid steel structure with top-and-seat angle connections is proposed. The cyclic tests of the semi-rigid steel connections with top and seat angles and the shaking table tests of the semi-rigid steel frame with top and seat angles are numerical analyzed. The numerical simulation results and experimental results are compared. The results showed that the modeling method has the advantages of fewer elements, fewer degrees of freedom, modeling convenience, computational efficiency and fewer time-consuming. The numerical simulation results from the proposed method agree well with experimental results, the precision can satisfy the engineering requirements.

关 键 词：半刚性 恢复力模型 顶底角钢 数值模拟 抗震性能 

分 类 号：TU391[建筑科学—结构工程]